Automatic stop



F. OBERSTQ AUTOMATIC STOP.

APPLICATION nuso JULY 2, 1919.

Patented Sept. 27, 1921.

Inventor for its objects to UNITED STATES PATENT OFFICE.

FRANK onnnsr,

OF GLENDALE. NEW YORK, ASSIGNOR TO SONORA PHONOGRAPH CORPORATION, ACORPORATION OF NEW YORK.

AUTOMATIC s'ror.

To all whom it may concern:

Be it known that I, FRANK Onnns'r, a subject of the Kingdom of Roumania,and residing at Glendale, in the borough of Queens, county of Queens,and State of New York, have invented certain new and useful Improvementsin Automatic Stops, of which the following is a specification.

My invention relates to an automatic stop device for talking machines,and has produce such a device which will be operated'by means actuatedby the movement of the stylus as the latter travels across the recorddisk by the engagement of the stylus with the record groove, and whichwill, automatically opprovision of crate mechanism to cause a brake tobe applied to a moving element to arrest, the rotation'of the motormechanism of the table machine.

A further object is to provide a device of the character described andby means of which the brake may be manually applied or manually releasedfrom engagement with theturn-table.

A further object of the invention isthe an automatic stop of thecharacter described, simple in construction, neat and attractive inappearance, thoroughly re- 30 nomical to manufacture, and which will notliable and efficient in its purpose, and ecogetout of order.

With to be more fully set forth hereinafter, the invention consists inthe novel construction, combination of elements, and arrangement ofparts, which will be exemplified in the construction" hereinafterdescribed in the specification and illustrated in the accompanyingdrawings considered together orseparately.

The invention will be first described in connection with theaccompanying drawings, illustrating one embodiment of my invention,wherein similar reference characters are used to designate correspondingpartsthroughout the several views, and then more specifically definedand indicated in the appended claims.

In the drawings,-

Figure 1 is a plan view of the device, the turn-table being shown indotted'lines, and

Fig. 2 is a side elevation partly in section.

In carrying out my invention, I provide Patented Sept. 27, 1921.

1919. Serial No. 308,131.

a base plate 1 which is secured to the motor board 2 of a talkingmachine, and at one sideofaxis of the turn-table.

Plvoted to the base plate is a handle lever 8 and pivoted at 4 to thehandle 3 is one end of a p1tman 5. The opposite end of the pltman lsprovidedwith a slot 6 through V which projects a screw 7. The extremityof the pitman is provided with a nose 8 and an extension 9. i

The nose Sis adapted to engage a cam face 10 on a lever 11 pivotedat 12to the base plate. One end of the lever 11 carries a pawl 13 adapted toengage a ratchet tooth '14 on a brake lever 15 pivoted on the screw 7.The lever 15 carries a brake shoe 16 adapted to'engage the innerperiphery of the flange 17 of the turn-table 18. A spring 19 is securedto the brake lever 15 and to the lever 11. The base plate carries a stop20 to l1mit the movement ofthe lever 11 in one direction. 7

At the end opposite the pawl 13 the lever 11 carries a pi'n21 adapted tobe engaged by an element 22 carried by the tone-arm (not shown) of thetalking machine.

Botatably mounted on the pivot 23 of the handle lever 3 is a detent 21-the head of which is. held in engagement with a notch 25in the pitman5 by means of a spring 26. The detent 2'4cacts to prevent overthrow of Ithe pitman. these and other objects 1n VlGW When the parts are in theposition shown in full lines in Fig. 1, the brake isreleased and theturn-table is free to rotate under the influence of the spring'of themotor (not shown). The brake arm is locked with the shoe 16 out ofengagement; with the flange 17 of the oturn-table,bythe engagement ofthe pawl'13 with the tooth 14. r

As the stylus of the sound-box reaches the inner end of the recordgroove the element 22 which may be carried by the tonearm comes intoengagement with the pin 21 and actuates the lever 11 to release the pawl13 from the tooth 1 1 and the spring 19 will apply the brake shoe 16 tothe flange of the. turn-table and arrest the rotation thereof. Thepitman 5 is not affected by this movement and the handle lever 3 remainsin the position shown in full lines.

When the tone-arm is swung back over the record to engage the beginningof a new record groove, the lever 3 is swung to the right as shown bythe dash and double dot line. This movement will pull the pitmandownward and the extension 9 of the nose 8 will engage the upper edge ofthe brake lever 15 and move the same to the full line position when thepawl 13 will engage beneath the tooth 14; and lock the shoe 16 in theposition away from the turn-table.

If, when the brake shoe is locked out of its operative position, it isdesired to apply the brake before the stylus reaches the end of therecord groove, the handle 3 is swung to the left as shown by the dot anddash lines. The pitman 5 will be raised, or moved in the direction awayfrom the lever 3, the lever 11 will be actuated by the engagement of theextension nose 8 with the cam face 10, the pawl 13 will be disengagedfrom the tooth 14 and the brake will be applied.

In accordance with the provisions of the patent statute, I havedescribed the principle of my invention, together with the apparatuswhich I- now consider to represent the best embodiment thereof, but Idesire it understood that my invention is not limited to the particularform of apparatus herein shown and. described, as it is obvious that theparticular embodiment herein shown and described is only illustrative ofmy invention, and that other means can be employed to obtain theseobjects and accomplish these results, without departing from the spiritof my invention.

Having now described my invention, what I claim and desire to secure byLetters Patent is: Y

1. A device of the character described, comprising a pivoted brake beam,a pivoted lever engaging the brake beam for holding the brake inreleased or off position, and a pivotally mounted member for movingsaidlever to inoperative position to permit the brake to be applied, thepivots of the brake beam, the lever and member all being substantiallyin the same straight line.

2. A device of the character described, comprising a pivoted brake beam,a tooth on the beam, a pawl engaging the tooth, a spring adapted to movethe beam in one direction, a manually operated slide for moving the beamin the opposite direction, and positively acting means for preventingoverthrow of the slide.

3. A device of the character described, comprising a pivoted brake beam,a tooth on the beam, a pawl engaging the tooth, a spring adapted to movethe beam in one direction, a manually operated slide for moving the beamin the opposite direction, and,

a spring pressed finger for preventing the overthrow of the slide.

4:. A device of the character described, comprising a pivoted brakebeam, a tooth on the beam, a lever pivoted intermediate its ends, a pawlon one end of the lever for engagement with the tooth, a cam on thelever, a pitman mounted for movement in a direction through the pivot ofthe lever, a lever for moving the pitman whereby the pitman will engagethe cam to release the pawl from the tooth, and a spring connecting thebeam and lever.

5. A device of the character described, comprising a pivoted brake beam,a tooth on the beam, a pivoted lever, a pawl on the lever for engagementwith the tooth, a cam on the lever, a pitman, a lever formoving thepitman into engagement with the cam in the direction of the length ofthe lever whereby the pitman will engage the cam to release the pawlfrom the tooth, and a spring connecting the beam and lever, and meanscarried by the pitman for moving the brake beam against the tension ofthe sprin I 6. K device of the character described, comprising a pivotedbrake beam, a tooth on the beam, a pivoted lever, a pawl on the leverfor engagement with the tooth, a cam on the lever, a pitman, a leverengagingthe pitman for moving it, whereby the pit man will engage thecam to releasethe pawl from the tooth, means engaging the pitman at apoint spaced from its engagement by the lever for retarding themovements ,of the pitman, and a spring connecting the beam and lever.

signed this 27th day of This specification June, 1919.

FRANK OBERST.

